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Production and Decay Properties of 272 111 and its Daughter Nuclei

2004; Physical Society of Japan; Volume: 73; Issue: 7 Linguagem: Inglês

10.1143/jpsj.73.1738

1347-4073

Kenji Morita, K. Morimoto, D. Kaji, Hiromitsu Haba, E. Ideguchi, J. Péter, R. Kanungo, K. Katori, H. Koura, Hiroyuki Kudo, T. Ohnishi, A. Ozawa, T. Suda, Keisuke Sueki, I. Tanihata, X. Xu, A. V. Yeremin, Akira Yoneda, A. Yoshida, Yaliang Zhao, Tianle Zheng, Shin Goto, Fuyuki Tokanai,

Atomic and Molecular Physics

The production and decay of 272 111 has been investigated using a gas-filled recoil ion separator in irradiations of 209 Bi targets with 64 Ni beam at 320, 323 and 326 MeV. We have observed 14 α-decay chains in total, that can be assigned, on the basis of their time correlations, to subsequent decays from 272 111 produced in the 209 Bi( 64 Ni,1n) reaction. The present result is the first clear confirmation for the discovery of 272 111 and its α-decay products, 264 Bh and 268 Mt, reported previously by a GSI group. New information on their half-lives and decay energies as well as the excitation function is presented.